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Buğra Balkaç

Lead Data Scientist

Trendyol | İstanbul - Turkey

Technologies

My Portfolio Highlights

My New Course

Introduction to R

My New Track

Importing & Cleaning Data

My New Course

Introduction to R

Machine learning whisperer, taming algorithms to reveal their secrets.

My Work

Take a look at my latest work.

course

Introduction to the Tidyverse

course

Introduction to R

course

Intermediate R

course

Introduction to the Tidyverse

My Certifications

These are the industry credentials that I’ve earned.

Other Certificates

Coursera Data Science Specialization

Coursera Deep Learning Specialization

Coursera Executive Data Science Specialization

DataCamp Data Scientist with R Track

Udacity Data Analyst Nanodegree

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to R
Intermediate R
Introduction to the Tidyverse
Introduction to Relational Databases in SQL

My Work Experience

Where I've interned and worked during my career.

Trendyol Group | Apr 2024 - Present

Data Science Lead

N/A

PwC | Jun 2019 - Apr 2024

Risk Assurance - Advanced Analytics - Senior Manager

Working as Senior Manager at Advanced Analytics Department under the Risk Assurance Services. Managing a team of 4-6 people that changes on a project basis. Main domains are financial services sector and sector agnostic advanced analytics solutions. ● Conducted data analysis and provided data-driven recommendations for analytics solutions using R, Python, SAS, and SQL for clients across various industries, including financial services, retail, supply chain, and production. ● Designed and developed customized Analytical & Machine Learning solutions using state-of-the-art technologies and best practices, such as LightGBM, XGBoost, Scikit-learn, etc. ●Provided ongoing support and maintenance to ensure optimal performance, reliability, and user satisfaction of clients' analytics and machine learning systems. ●Stayed up-to-date with the latest advancements in Machine Learning and Artificial Intelligence technologies and best practices. ●Presented and effectively communicated the value of analytics and machine learning solutions to clients and internal stakeholders using data visualization tools like Tableau, Power BI, and RShiny. ●Identified and secured more than 10 new business opportunities by leveraging analytics and machine learning solutions. ●Managed the end-to-end deployment of analytical solutions, including data collection, processing, model development, and evaluation. ●Developed, validated, and audited end-to-end IFRS 9 ECL Calculation and Methodology, including IFRS 9 PD, LGD, and CCF models, for different financial companies, ensuring compliance with regulatory standards and best practices. ●Developed and implemented a machine learning-based data extraction approach that reduced the time and cost of extracting balance sheets and income statements from various formats such as PDF, Excel, and Word. ●Created an IFRS 9 validation tool based on RShiny, automating the validation process and increasing the accuracy and efficiency of the results.
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Yapı Kredi | Mar 2017 - Jun 2019

Data Scientist

Worked as Data Scientist in Advanced Analytics department which is directly report to Chief Data Officer. ● Developed and deployed supervised and unsupervised models for various risk domains, including Application Risk, Behavioral Risk, Collection, and Fraud. These models have significantly improved the accuracy and efficiency of risk assessment and management. ● Developed a clustering algorithm that utilizes address information in application models. To obtain the necessary data, I scraped the addresses of customers and demographic information of all provinces, districts, and neighborhoods in Turkey from the internet. This data was specifically collected for the Non-bank/Under-bank customer portfolio. ● Applied Data Mining, Statistical Learning, and Hybrid learning algorithms, such as Logistic Regression, Random Forest, and K-means Clustering, to test and deploy models for various analytical projects. ● Managed the end-to-end process of analyzing, designing, modeling, and testing for over 10 analytical projects. These projects have provided valuable business insights and delivered tangible value to clients across diverse industries. ● Led and mentored junior data scientists, providing guidance and support in their roles. ● Utilized SAS Miner/Guide for data mining and statistical learning, Python for data processing and modeling, and R Programming for data visualization and reporting.

BankPozitif | Jun 2015 - Mar 2017

Statistical Model Developer and Data Scientist

Worked as Senior Statistical Model Developer and Data Scientist in Retail Loan department. One year of this experience is also led the team consists of 3 people. ● Used IBM SPSS Modeler for data mining and statistical learning, R Programming for data processing and modeling, and Tableau for data visualization and reporting. ● Conducted data analysis and segmentation for Retail Loan Risks and Customers using IBM SPSS Modeler and R Programming. This initiative led to improved risk management and enhanced customer retention strategies. ● Applied Data Mining, Statistical Learning, and Hybrid learning algorithms, such as Decision Trees, Neural Networks, and Support Vector Machines, to test and deploy models for various analytical projects. ● Managed the end-to-end process of analyzing, designing, modeling, and testing for 10 analytical projects within the Retail Loan department. These projects provided valuable business insights and delivered tangible value. ● Designed and developed a comprehensive Tableau Dashboard utilizing advanced data visualization techniques and best practices. The dashboard tracked real-time performance and trends of the portfolio, resulting in improved decision-making and reporting capabilities. ● Led a team of three data scientists, providing guidance, feedback, and mentoring on their projects and performance. ● Ensured the maintenance and management of the analytic projects deployed in the live system, ensuring their continued functionality and accuracy. ● Utilized IBM SPSS Modeler for data mining and statistical learning, R Programming for data processing and modeling, and Tableau for data visualization and reporting.

Migros Ticaret A.Ş. | Jul 2014 - Jun 2015

Data Scientist / Data Modeling Specialist

Worked as Data Analyst/Scientist in Data Science team is built inside the IT Datawarehouse Department. ● Conducted data analysis and developed machine learning models using IBM SPSS Modeler and Teradata Warehouse Miner for various analytical projects within Migros Datawarehouse. These projects included Market Basket Analysis, Customer RFM Segmentation, Customer Churn Modeling, Product Offer Mechanisms, Market Fraud Analysis, and Campaign Fraud Analysis. ● Utilized Tableau to analyze and visualize data and insights for different projects, effectively communicating the value and impact of the analytical solutions to stakeholders. ● Scheduled and deployed modeling streams using IBM C&DS to ensure the reliability and efficiency of the analytical solutions within the live system. ● Applied the Apriori algorithm and other data mining techniques to perform Market Basket Analysis, addressing various business problems. ● Employed IBM SPSS Modeler to conduct Customer RFM Segmentation, which involved segmenting customers based on their recency, frequency, and monetary value of purchases. This led to improved customer retention and loyalty. ● Utilized R programming to perform Customer Churn Modeling, resulting in improved customer retention and loyalty. ● Developed Product Offer Mechanisms based on bi-weekly Campaign Brochures and customers' past behavior, using IBM SPSS Modeler. ● Conducted Market Fraud Analysis and Campaign Fraud Analysis, defining different types of fraud scenarios using SQL. ● Effectively utilized IBM SPSS Modeler 16, Teradata Warehouse Modeler 5.3.4, and Tableau in the execution of these projects.

Migros Ticaret A.Ş. | Jan 2014 - Jul 2014

Project Management Senior Specialist

Worked as a Project Manager for three years, overseeing the requirements of different internal departments at Migros, including IT, Business Development, and Supply Chain & Logistics Management. ● Managed the end-to-end process of gathering, analyzing, and delivering requirements for various projects across different internal departments of Migros, including IT, Business Development, and Supply Chain & Logistics Management. This comprehensive approach resulted in enhanced project efficiency and improved quality outcomes.

Migros Ticaret A.Ş. | Jul 2011 - Jan 2014

Project Management Specialist

Extensive experience in managing information technology projects related to retail, supply chain operations, business development, and process management. As a Project Manager, I worked for three years handling the requirements of various internal departments at Migros.. ● My main focus was on departments such as the IT Directorate,R&D Projects, Business Development Group Department, and Supply Chain & Logistics Management Group Department. Worked as a Project Manager of R&D Projects ( Migros IT Department has only R&D Center working in Retail). ● Conducted As is & To Be analysis for projects ● Managed IT processes for the R&D projects ● Created workflows and reports about the R&D Projects. Main Responsible for management and administration of Migros Project Management tool ● Created new business workflows, ● Integrated Software Development and IT processes with PMI Standards. ● Developed Top Management Dashboards to track Project Statuses around the IT department.

4S Information Technologies | Jun 2010 - Nov 2010

HP Project & Porftolio Management Consultant

● Designed & Implement Performance Tests and Functional Tests. ● Integrated on HP Project & Portfolio Management on different customers. ● Participated Customer Tests and Proof of Concepts ● Presented and demonstrated solutions to prospective customers based on detailed customer requirements ● Prepared User's Portlet and Designing PPM Form Screens for Users ● Prepared Functional and Performance Test Scenarios. ● Done End-User Training & Support

AVEA | Jun 2010 - Nov 2010

HP Project & Portfolio Management Consultant

● Worked as a HP PPM Consultant for the ESAM Project. ● Built SQL Queries for integration of HP products. ● Managed and developed process for HP PPM Product. ● ESAM Project is the integration of HP PPM and HP SM Products.

vdf | Jul 2009 - Sep 2009

Intern at System Development and IT Department

Worked as an intern at System Development department. ● Tested internal programs of VDF Company, making improvement reports of the processes. ● Created MS Visio documents for workflows of these internal tools. ● Researched Cobit standard which is one of the main standards of IT processes and Project Management ● Created a MS Powerpoint Presentation for internal usage in VDF Company

Camp Future Stars | Jun 2008 - Jun 2009

Basketball Coach

● Created appropriate basketball training programs, lessons and activities for students of Basketball school ● Enhanced self-esteem of children, got sport discipline and team spirit, shared feelings such as empathy, winning and losing

My Education

Take a look at my formal education

Associate's degree, Banking and InsuranceAtatürk Üniversitesi | 2023
Master of Science, Management Information SystemsMarmara Üniversitesi | 2013
Bachelor of Science, Manufacturing Systems and Industrial EngineeringSabanci Üniversitesi | 2010

About Me

Data Scientist with 10+ years of experience history of working in the banking and retail industry. Experienced at creating models, using predictive data modeling, and analyzing data mining algorithms to deliver insights and implement action-oriented

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